Since the discovery of the acceleration, theorists have calculated that the universe will continue to expand faster and faster — until the cosmos becomes (trillions of years later) utterly cold, dark ...

As the universe expands, the density of both regular and dark matter drops, while more and more dark energy manifests. To ...

The kilonova briefly mimicked the conditions immediately following the Big Bang, and allowed scientists to confirm the source ...

The second law in its classical form also determines the ultimate fate of the universe. As entropy increases, eventually there’s no more order to make chaos from, and ultimately interesting ...